attached to superficial to muscles innervated by the facial nerve base of cranium posterior digastric muscle http://purl.obolibrary.org/obo/UBERON_0010944 Ready for review. http://www.feedexp.org/wiki/Mammalian_Muscle_Ontology_Workshop The posterior digastric is a pharyngeal arch II muscle that participates in oral pharyngeal behavior, is innervated by the digastric branch of facial nerve and attaches to the posterior cranial base and the hyoid apparatus. It is found superficial to the mylohyoid muscle. mylohyoid muscle